泵及泵用作透平时的数值模拟与外特性实验

针对泵及泵用作透平时的内部流动规律等问题展开了研究,并建立了一种开式泵用作透平时的实验台,同时对一单级单吸离心泵的正反工况进行了外特性实验研究,从而得到了相应比转速的泵在正反工况下的外特性曲线,进而验证了泵在反运转时可用作透平且具有较高的效率.采用全流场和结构化网格技术对泵及泵用作透平时进行了数值计算,计算结果与实验结果吻合良好;对泵及泵用作透平时的内部速度场和压力场进行了分析.

Numerical Simulation and Performance Experiment on Pump and Pump as Turbine

An open pump as turbine(PAT) test rig was built to examine the relations between pump and PAT performance characteristics,and its two models’ internal flow field.The experiment on a single stage centrifugal pump was conducted to study its performance characteristics under normal and reverse operating conditions.The results show that the reverse operating centrifugal pump has high efficiency.The numerical simulation on the pump and the PAT was performed by adopting all domain and structural mesh technique,and the simulation results are in reasonable consistency with the experimental data.Additionally the analyses were performed on the pressure field and the velocity field inside the pump and the PAT.